A sports analyst is hired to provide information on the type of students that wi

Question

A sports analyst is hired to provide information on the type of students that will possibly play sports during high school. The data is provided from information on boys and girls in middle school. A random survey is taken of 225 students at a local school. Of these 225 students 151 are boys. The students in middle school are grouped by grades 6th, 7th and 8th. The data summarized in the table below: 6th grade Boys 65 Girls 16 Total 81 7th Grade Boys 50 Girls 28 Total 78 8th Grade Boys 36 Girls 30 Total 66 a)A student is selected at random, find the probability of not selecting a girl b) Find the probability of selecting a student in 7th grade c) find the probability of selecting a 7th grade boy d) find the probability of selecting a 7th grade girl e) find the probability of selecting an 8th grader, given the student selected is a boy

Explanation / Answer

a) probability of not selecting a girl =Probabilty of selecting a boy =151/225

b)probability of selecting a student in 7th grade =78/225

c)probability of selecting a 7th grade boy =50/225

d) probability of selecting a 7th grade girl=28/225

e)probability of selecting an 8th grader, given the student selected is a boy =36/151

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